Convenient and accurate formulas for stress intensity factor distribution of semi-elliptical surface crack

被引：1
作者：
Takase, Yasushi [1 ]
Noda, Nao-Aki [1 ]
机构：
[1] Kyushu Inst Technol, Dept Mech Engn, Fukuoka, Japan
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2021年 / 35卷 / 14N16期
关键词：
Stress intensity factor; semi-elliptical crack; elliptical crack; approximate formula;
D O I：
10.1142/S0217979221400026
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, the stress intensity factor (SIF) formula F-ISE along the crack front of a semi-elliptical surface crack is studied. The exact SIF solution F-ISE is used by solving the hypersingular integral equation of the body force method discussed in the previous paper. To obtain the accurate formula, the SIF ratio F-ISE/F-IE is focused considering the exact solution F-IE of an elliptical crack. By applying the least squares method to the ratio F-ISE/F-IE, accurate and convenient formula is proposed. The proposed formulas may provide the accurate SIF distributions for the aspect ratio a/b = 1-4 better than 0.2% accuracy.
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页数：5
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